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42 lines
947 B
Go
42 lines
947 B
Go
// [Timers](timers) are for when you want to do
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// something once in the future - _tickers_ are for when
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// you want to do something repeatedly at regular
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// intervals. Here's an example of a ticker that ticks
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// periodically until we stop it.
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package main
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import (
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"fmt"
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"time"
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)
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func main() {
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// Tickers use a similar mechanism to timers: a
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// channel that is sent values. Here we'll use the
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// `select` builtin on the channel to await the
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// values as they arrive every 500ms.
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ticker := time.NewTicker(500 * time.Millisecond)
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done := make(chan bool)
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go func() {
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for {
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select {
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case <-done:
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return
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case t := <-ticker.C:
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fmt.Println("Tick at", t)
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}
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}
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}()
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// Tickers can be stopped like timers. Once a ticker
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// is stopped it won't receive any more values on its
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// channel. We'll stop ours after 1600ms.
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time.Sleep(1600 * time.Millisecond)
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ticker.Stop()
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done <- true
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fmt.Println("Ticker stopped")
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}
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